ERR_NGROK_SHIP_ENDPOINT_URL_PORT_REQUIRED: The FIELD value VALUE must include a port for the SCHEME scheme - ngrok documentation

What does ERR_NGROK_SHIP_ENDPOINT_URL_PORT_REQUIRED mean?

ngrok returns ERR_NGROK_SHIP_ENDPOINT_URL_PORT_REQUIRED with this message:

The <FIELD> value <VALUE> must include a port for the <SCHEME> scheme.

Where can I get more help with ERR_NGROK_SHIP_ENDPOINT_URL_PORT_REQUIRED?

Email support@ngrok.com and include the error code.